<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>客户端发送数据</title>
</head>
<body>
<form action="/web02/x" >
  <p>用户名: <input type="text" name="username"></p>
  <p><input type="submit" value="发送"></p>
</form>
</body>
</html>